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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
    </build-info>


<item>
            <title>[CSHARP-3144] Linq Contains produce wrong expression</title>
                <link>https://jira.mongodb.org/browse/CSHARP-3144</link>
                <project id="10041" key="CSHARP">C# Driver</project>
                    <description>&lt;p&gt;when i try to check if collection contains some element i get&#160;System.ArgumentException: Unsupported filter: Contains().&lt;/p&gt;

&lt;p&gt;for example, we have Order class with collection of order positions:&lt;/p&gt;

&lt;p&gt;class Order&lt;/p&gt;

{

&#160; &#160;public int Id \{ get; set; }&lt;br/&gt;
&lt;br/&gt;
&#160; &#160;public List&amp;lt;OrderItem&amp;gt; Items { get; set; }&lt;br/&gt;
&lt;br/&gt;
...&lt;br/&gt;
&lt;br/&gt;
}&lt;br/&gt;
&lt;br/&gt;
&#160;&lt;br/&gt;
&lt;br/&gt;
in each position we have GoodId and Amount:&lt;br/&gt;
&lt;br/&gt;
class OrderPosition&lt;br/&gt;
{

&#160; &#160;public int Id { get; set; }

&lt;p&gt;&#160; &#160;public int GoodId { get; set; }&lt;/p&gt;

&lt;p&gt;&#160; &#160;public int Amount { get; set; }&lt;/p&gt;

&lt;p&gt;}&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;now i want to select all Orders where some&#160; good is present:&lt;/p&gt;

&lt;p&gt;var orders = db&lt;br/&gt;
&#160; &#160;.GetCollection&amp;lt;Order&amp;gt;(&quot;order&quot;).AsQueryable()&lt;br/&gt;
&#160; &#160;.Where(x =&amp;gt; x.Items.Select(e =&amp;gt; e.GoodId).Contains(2))&lt;br/&gt;
&#160; &#160;.ToArray();&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;yes, i know that i can rewrite query, but thissample is adopted my work case, so i nee dexactly that expression&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;and there is i get exception:&lt;/p&gt;

&lt;p&gt;System.ArgumentException: Unsupported filter: Contains({document}&lt;/p&gt;
{Items}
&lt;p&gt;.Select({document}&lt;/p&gt;
{GoodId}
&lt;p&gt;)).&lt;br/&gt;
 at MongoDB.Driver.Linq.Translators.PredicateTranslator.Translate(Expression node)&lt;br/&gt;
 at MongoDB.Driver.Linq.Translators.PredicateTranslator.Translate(Expression node, IBsonSerializerRegistry serializerRegistry)&lt;br/&gt;
 at MongoDB.Driver.Linq.Translators.QueryableTranslator.TranslateWhere(WhereExpression node)&lt;br/&gt;
 at MongoDB.Driver.Linq.Translators.QueryableTranslator.Translate(Expression node)&lt;br/&gt;
 at MongoDB.Driver.Linq.Translators.QueryableTranslator.TranslatePipeline(PipelineExpression node)&lt;br/&gt;
 at MongoDB.Driver.Linq.Translators.QueryableTranslator.Translate(Expression node)&lt;br/&gt;
 at MongoDB.Driver.Linq.Translators.QueryableTranslator.Translate(Expression node, IBsonSerializerRegistry serializerRegistry, ExpressionTranslationOptions translationOptions)&lt;br/&gt;
 at MongoDB.Driver.Linq.MongoQueryProviderImpl`1.Translate(Expression expression)&lt;br/&gt;
 at MongoDB.Driver.Linq.MongoQueryProviderImpl`1.Execute(Expression expression)&lt;br/&gt;
 at MongoDB.Driver.Linq.MongoQueryableImpl`2.GetEnumerator()&lt;br/&gt;
 at System.Collections.Generic.LargeArrayBuilder`1.AddRange(IEnumerable`1 items)&lt;br/&gt;
 at System.Collections.Generic.EnumerableHelpers.ToArray&lt;span class=&quot;error&quot;&gt;&amp;#91;T&amp;#93;&lt;/span&gt;(IEnumerable`1 source)&lt;br/&gt;
 at System.Linq.Enumerable.ToArray&lt;span class=&quot;error&quot;&gt;&amp;#91;TSource&amp;#93;&lt;/span&gt;(IEnumerable`1 source)&lt;br/&gt;
 at ConsoleApp1.Program.Main(String[] args) in&#160;&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;now i use workaround and use following expression:&lt;/p&gt;

&lt;p&gt;var orders = db&lt;br/&gt;
&#160; &#160;.GetCollection&amp;lt;Order&amp;gt;(&quot;order&quot;).AsQueryable()&lt;br/&gt;
&#160; &#160;.Where(x =&amp;gt; x.Items.Select(e =&amp;gt; e.GoodId).Any(e =&amp;gt; e == 2))&lt;br/&gt;
&#160; &#160;.ToArray();&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;but iu think that this bug need to be fixed&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;i created fiddle with full example:&#160;&lt;a href=&quot;https://dotnetfiddle.net/yfQk7U&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://dotnetfiddle.net/yfQk7U&lt;/a&gt;&lt;/p&gt;</description>
                <environment>.net core 3.1</environment>
        <key id="1389696">CSHARP-3144</key>
            <summary>Linq Contains produce wrong expression</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="13201">Fixed</resolution>
                                        <assignee username="robert@mongodb.com">Robert Stam</assignee>
                                    <reporter username="anatoly.kryzhanovsky@singularis-lab.com">&#1040;&#1085;&#1072;&#1090;&#1086;&#1083;&#1080;&#1081; &#1050;&#1088;&#1099;&#1078;&#1072;&#1085;&#1086;&#1074;&#1089;&#1082;&#1080;&#1081;</reporter>
                        <labels>
                    </labels>
                <created>Thu, 25 Jun 2020 03:51:50 +0000</created>
                <updated>Sat, 28 Oct 2023 11:48:15 +0000</updated>
                            <resolved>Sat, 29 Oct 2022 16:15:43 +0000</resolved>
                                    <version>2.10.4</version>
                                    <fixVersion>2.19.0</fixVersion>
                                    <component>Linq</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4937783" author="xgen-internal-githook" created="Sat, 29 Oct 2022 16:15:10 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;rstam&apos;, &apos;email&apos;: &apos;robert@robertstam.org&apos;, &apos;username&apos;: &apos;rstam&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/CSHARP-3144&quot; title=&quot;Linq Contains produce wrong expression&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CSHARP-3144&quot;&gt;&lt;del&gt;CSHARP-3144&lt;/del&gt;&lt;/a&gt;: Linq Contains produce wrong expression.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-csharp-driver/commit/9613bb44de65df516e54e32212148fb6a3f39188&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-csharp-driver/commit/9613bb44de65df516e54e32212148fb6a3f39188&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4908874" author="rstam" created="Tue, 18 Oct 2022 05:07:55 +0000"  >&lt;p&gt;My repro confirming that this works in LINQ3 is in code review on this branch:&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://github.com/rstam/mongo-csharp-driver/tree/csharp3144&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/rstam/mongo-csharp-driver/tree/csharp3144&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;The original query:&lt;/p&gt;


&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;.Where(x =&amp;gt; x.Items.Select(e =&amp;gt; e.GoodId).Contains(&lt;/span&gt;&lt;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;))&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;translates to:&lt;/p&gt;

&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;{ $match : { $expr : { $in : [&lt;/span&gt;&lt;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;, &lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&apos;$Items.GoodId&apos;&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;] } } }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;and the suggested workaround:&lt;/p&gt;

&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;.Where(x =&amp;gt; x.Items.Select(e =&amp;gt; e.GoodId).Any(e =&amp;gt; e == &lt;/span&gt;&lt;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;))&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;translates to:&lt;/p&gt;

&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;{ $match : { $expr : { $anyElementTrue : { $map : { input : &lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&apos;$Items.GoodId&apos;&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;, as : &lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&apos;e&apos;&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;, in : { $eq : [&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&apos;$$e&apos;&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;, &lt;/span&gt;&lt;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;] } } } } } }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;</comment>
                            <comment id="4908872" author="rstam" created="Tue, 18 Oct 2022 05:05:31 +0000"  >&lt;p&gt;This issue has been fixed in the new LINQ provider (known as LINQ3), which was introduced in the 2.14 release.&lt;/p&gt;

&lt;p&gt;Configure your &lt;tt&gt;MongoClientSettings&lt;/tt&gt; to use &lt;tt&gt;LinqProvider.V3&lt;/tt&gt; if you want to use this functionality.&lt;/p&gt;

&lt;p&gt;To configure a client to use the LINQ3 provider use code like the following&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;var connectionString = &quot;mongodb://localhost&quot;;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;var clientSettings = MongoClientSettings.FromConnectionString(connectionString);&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;clientSettings.LinqProvider = LinqProvider.V3;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;var client = new MongoClient(clientSettings);&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;</comment>
                            <comment id="3223225" author="JIRAUSER1253519" created="Thu, 25 Jun 2020 04:17:01 +0000"  >&lt;p&gt;additional info: expression from workaround does not work also&lt;/p&gt;</comment>
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